diff options
| author | Hoernchen <la@tfc-server.de> | 2012-05-05 12:56:42 +0200 |
|---|---|---|
| committer | Steve Markgraf <steve@steve-m.de> | 2012-05-05 13:54:24 +0200 |
| commit | b6652f33df4e12c77f4fd2687426eb4afae632b0 (patch) | |
| tree | 413a8b4ac1a00d465d6d63811edf0110c44e5f7a | |
| parent | 259e61fb17618cc5b49bdf48296dc571c21bb69b (diff) | |
uhf appears to work better for ads-b
Signed-off-by: Steve Markgraf <steve@steve-m.de>
| -rw-r--r-- | src/tuner_e4k.c | 35 |
1 files changed, 22 insertions, 13 deletions
diff --git a/src/tuner_e4k.c b/src/tuner_e4k.c index 08b812a..cda0c2a 100644 --- a/src/tuner_e4k.c +++ b/src/tuner_e4k.c @@ -167,20 +167,29 @@ static int closest_arr_idx(const uint32_t *arr, unsigned int arr_size, uint32_t } /* return 4-bit index as to which RF filter to select */ -static int choose_rf_filter(uint32_t freq) +static int choose_rf_filter(enum e4k_band band, uint32_t freq) { int rc; - if (freq < MHZ(350)) - rc = 0; - else if (freq < MHZ(1000)) - rc = closest_arr_idx(rf_filt_center_uhf, - ARRAY_SIZE(rf_filt_center_uhf), - freq); - else - rc = closest_arr_idx(rf_filt_center_l, - ARRAY_SIZE(rf_filt_center_l), - freq); + switch (band) { + case E4K_BAND_VHF2: + case E4K_BAND_VHF3: + rc = 0; + break; + case E4K_BAND_UHF: + rc = closest_arr_idx(rf_filt_center_uhf, + ARRAY_SIZE(rf_filt_center_uhf), + freq); + break; + case E4K_BAND_L: + rc = closest_arr_idx(rf_filt_center_l, + ARRAY_SIZE(rf_filt_center_l), + freq); + break; + default: + rc -EINVAL; + break; + } return rc; } @@ -190,7 +199,7 @@ int e4k_rf_filter_set(struct e4k_state *e4k) { int rc; - rc = choose_rf_filter(e4k->vco.flo); + rc = choose_rf_filter(e4k->band, e4k->vco.flo); if (rc < 0) return rc; @@ -525,7 +534,7 @@ int e4k_tune_params(struct e4k_state *e4k, struct e4k_pll_params *p) e4k_band_set(e4k, E4K_BAND_VHF2); else if (e4k->vco.flo < MHZ(350)) e4k_band_set(e4k, E4K_BAND_VHF3); - else if (e4k->vco.flo < MHZ(1000)) + else if (e4k->vco.flo < MHZ(1135)) e4k_band_set(e4k, E4K_BAND_UHF); else e4k_band_set(e4k, E4K_BAND_L); |